:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f4f6f8;
  --color-text: #1a202c;
  --color-text-muted: #556070;
  --color-primary: #2456e6;
  --color-primary-dark: #1a41b0;
  --color-accent: #e6f0ff;
  --color-border: #dde3ea;
  --radius: 12px;
  --max-width: 960px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP", sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid var(--color-border);
  z-index: 10;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 56px;
}

.logo {
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.02em;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  transition: opacity 0.2s;
}

.btn:hover {
  opacity: 0.85;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-ghost {
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}

.btn-small {
  padding: 8px 16px;
  font-size: 0.85rem;
  background: var(--color-primary);
  color: #fff;
}

.btn-large {
  padding: 16px 40px;
  font-size: 1.1rem;
}

/* Hero */
.hero {
  padding: 72px 0 64px;
  text-align: center;
  background: linear-gradient(180deg, var(--color-accent) 0%, var(--color-bg) 100%);
}

.badge {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: 2.4rem;
  line-height: 1.4;
  margin-bottom: 20px;
}

.lead {
  color: var(--color-text-muted);
  margin-bottom: 28px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.hero-note {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* Sections */
.section {
  padding: 64px 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section h2 {
  text-align: center;
  font-size: 1.7rem;
  margin-bottom: 40px;
}

.section-cta {
  text-align: center;
  background: var(--color-accent);
}

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 24px;
}

.card h3 {
  font-size: 1.1rem;
  margin-bottom: 12px;
}

.card p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.card-featured {
  border: 2px solid var(--color-primary);
  position: relative;
}

.card-tag {
  position: absolute;
  top: -14px;
  left: 20px;
  background: var(--color-primary);
  color: #fff !important;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 2px 14px;
  border-radius: 999px;
}

.price {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary-dark) !important;
  margin-bottom: 10px;
}

.pricing-note {
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 24px;
}

/* Steps */
.steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.steps li {
  background: var(--color-bg);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  margin-bottom: 14px;
}

.steps h3 {
  font-size: 1.05rem;
  margin-bottom: 10px;
}

.steps p {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  text-align: left;
}

/* FAQ */
.faq {
  max-width: 720px;
  margin: 0 auto;
}

.faq dt {
  font-weight: 700;
  padding: 18px 0 6px;
  border-top: 1px solid var(--color-border);
}

.faq dt:first-child {
  border-top: none;
}

.faq dd {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  padding-bottom: 18px;
}

/* Footer */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 32px 0;
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* Responsive */
.sp-only {
  display: none;
}

@media (max-width: 600px) {
  .hero h1 {
    font-size: 1.7rem;
  }

  .sp-only {
    display: inline;
  }

  .section {
    padding: 48px 0;
  }
}